#include <stdio.h>
#include <string.h>
void del(char a[50],int k)
// printf("gh--");
char b[k];
//for(i=0;i<k;i++)
//b[k] = 0;
int i=0,j=0;
for(i=0;i<k;i++)
{ if(i==0)
{
if(a[i+1]!=a[i])
b[j++] = a[i];
}
else {
if(a[i+1]!= a[i] && a[i]!=a[i-1])
b[j++] = a[i];
}
}
for(i=0;i<j;i++)
if(b[i]==b[i+1])
del(b,j);
for(i=0;i<j;i++)
return;
}
int main() {
int t;
while(t--)
{ char a[50];
int k;
del(a,k);
}
return 0;
}
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